Note that the two security vulnerabilities fixed in OpenSSL 0.9.8f are not relevant for Apache 2.2 and mod_ssl.
Apache does not: 1.) use DTLS (datagram variation of TLS), or 2.) call SSL_get_shared_ciphers().
Installing OpenSSL 0.9.8f is not urgent if you are already running OpenSSL 0.9.8e.

Nevertheless, it is not a good practice to fall behind on OpenSSL versions. Many smaller non-security fixes are in 0.9.8f.

If there is a new OpenSSL 0.9.8g in the next few days (or weeks) - it may be a good idea to wait for it.
If this is not acceptable - you can either live with the error.log entries, or else fix the OpenSSL 0.9.8f source code yourself and re-build it.

If you build OpenSSL from the source code and you want to fix this problem yourself, edit the file srclib\openssl\ssl\s3_srvr.c and change line 746
from: